The Doctor always says time can be rewritten, he does it himself, changes small events even in the slightest most insignificant ways, someone else is doing it too...

Time is dying. Someone in the background, in the shadow of time, is rearranging things as they see fit. They alter major historical events and cause the universes to bleed into each other. Villains of past, present, and future coming together and plotting their revenge and the destruction of the universes.

Alternate realities are blending, Time Lords and Ladies are appearing, fixed points continue to manifest and disappear. The Time Locks are becoming weaker, threatening to dissolve. Who is doing this? Why and how do we stop them?

The time has come for you to make your choice. Join the efforts to restore the natural timeline, or aide the mysterious forces that are unraveling it. Whatever you decide to do, the fate of all time and space rests in your hands.